Winch or windlass.



A y W ,A 572966 e, ,2 E I c M www@ A @www m13 m3 tom/wwf;

Ela

dll

lill

"llldllll tllllflzlllltlldt WINCH lt Vf :specification of Letters Patent.

Application filed September 14:, 1917.

To all 'whom it may concern.'

l'le it known that ll, llllannnn Noem, a subject ot the ling oif Great Britain, residing in the city, county., and tritate ot New York, have invented certain new and useful llinprovements in Winches or llVindlasses, ot which the following is a specilication, rei?- erenc'e being had to the accompanying dravvings, illustrative of and showing one particular term of my invention.

ldy invention relates to Winches and Windlasses to be employed tor handling cable sub ject to varying strains, and et considerable length. necessitating the spooling of the cable in layers on a storage drum ot the winch and is particularly directed toward simple 1nech anism whereby a tension decreasing by layers may be impressed upon the cable as wound on the storage drum, and to make this tension independent of the tension of the cable due to the primary load. Among the objects are to produce such a structure simple and reliable and automatic in its operation, and with various advantages as will appear from the speciiication and the drawings showing one 'torni ot embodiment et my invention, in Which- Figure l is a plan view of a Winch, and

lFig. 2 is a section ot the same at QWQ.

ln Fig. l, l() is tbe capstan drum driven by suitable power applied to gear Wheel l1. ldoth drum and Wheel are keyed to shaft l2 supported by bearings it-4.3. rl`he incoming or outgoing cable let is Wrapped about the capstan drum passing about sheavevvheels l5 and 16 and the spooling mechanism, and led to the storage drum l?, rotatably mounted on shaft l2 by the bearings 18H19. At one end of this drum is formed the brake-drum 20, coordinated with it be`V ing the brake-band 21. i fiat friction taco tor clutch abutment is tornied by the end oi' drum l?.

llllidably mounted upon the shalt l2 and lteyed to it is the clutch-hub Q2, having ratchet teeth 23 engaging with pavvls 24e-24 pivoted to the clutch disk 25, oit which 26 is the trictional material. Spring 27 reacting against abutment 28 keeps the clutch laces in contact.

llhe storage drum ll is geared to the spooling device by sprocket 50, chain 5l and sprocket 52 in turn driving Worm 53 and Worm wheel 54:. This latter being integral with the heart shaped cam 55, operating bell crank 56, pivoted at 57 and controlling the Patented llera 11, 191th tierial No, 191,363.

lead wheel 58 carried on suitable guides. This combination oit gearing and leverages is so proportioned and positioned as to inipart the correct travel to lead wheel 58 for spooling cable oi the desired size evenly and closely on drum l?, and as shoivn is only illustrative.

By the positive relation oif the storage drum to the spooling device the interposition oit the slipping clutch device in no ivay intertores with the proper laying oiz the cable on the storage drum, no matter what the relative movement between the sto 1age drum and capstan drum may be.

lt will thus be seen in the particular torni shown and herein speciiically described, the mechanism employed comprises a capstan drum driven by gearing from a suitable source of power by which the cable is reeled in or paid out. This capstan-druin is fastened to a shalt on which is rotatably mounted the storage drum or reel on which the cable is to be spooled. Between the capstan drive and this drum is a 'friction clutch tensioned` by a spring. 'lFhis clutch causes the storage drum to tend to rotate at the same speed as the capstan. The mini* mum diameter' oi the storage drum is sli glitly greater than the capstan diameter. 'llhe capstan is rotated from the motor. lhe cable is passed over suitably placed guide pulleys and reconducted to the storage drum which, tending to rotate at the same speed as the capstan, but being oi greater periphery` is constrained to slip against the torque necessary to slip the friction clutch, thereby tensioning the cable as spooled in a degree con trolled by the friction oi the clutch.

The couple turning the storage drum relative to the capstan is provided by the ten sion in the rope applied at the radius oi' its Winding circle, which radius is increased with each superposed layer on the storage drum. ll-lence, it the torque necessary to slip the clutch is constant, the increase ot the arm or radius of succeeding layers as laid, will decrease the tension in the rope in corresponding proportion ,-the condition desired.

lin order that unreeling may be properly accomplished, a brake is applied to the storage drum, and in this way a reversal ot conditions is created 'llhe major diameter being that oi the storage drum and the cable passing about the capstan, it obvious that it the cable be kept taut., the capstan must rotate at greater speed than the storage drum, in which case the interposed friction clutch must slip in the opposite direction. If, however, the tension of unreeling became less than that required to slip the clutch, looping of the cable might occur unless the cable coils on the capstan released suiiiciently to themselves act as a freeing clutch.

All such difficulties are, however, eliminated by mounting the clutch face upon a ratchet or one-way positive clutch of any preferred form, in which case the capsta-ndrum is entirely freed from constraint in the direction necessary for unreeling.

IVhile I have described a particular embodiment of my invention, many and various modifications are within the scope of my invention, but what I claim and desire to secure by Letters Patent is:

l. In a winch, a hauling drum, a storage drum inaxial alinement with it and frictional means interposed between the hauling drum and the storage drum whereby the degree of tension inthe cable between the hauling drum and the storage drum may be controlled.

f 2. In a winch, a hauling drum, a storage drum of greater diameter than the hauling drum, a friction clutch interposed between the hauling drum and the storage drum for tensioning the cable between the hauling drum and the storage drum during the reeling in operation and means whereby the hauling'drum is released from the constraint of the friction clutch during the paying out operation.

3. Inma winch, a positively driven hauling drum, a storage drum coaxial with the hauling drum and frictionally driven therefrom, a brake on said storage drum and means between the storage drum and the ha'uling drum whereby during the unreeling processthe cable is entirely subjected to the control of said brake.

Camerini this patent may be obtained for ve cents each, by addressing the Commissioner 4. In a winch, a storage drum and a eoaxial hauling drum, means of securing tension decreasing by layers in cable stored on said storage drum by intel-posing between said storage drum and said hauling drinn of smaller diameter 0f a friction clutch of eonstant lesistance to slip.

5. In a winch, a hauling drum7 a coaxial storage drum of greater diameter. sheave pulleys directing the cable handled from the hauling drum to the storage drumr` a re versible spooling device positively geared (o the storage drum, means for inter-posing frietional connection between the hauling drum and the storage drum during motion in one direction and means for releasing connection between the hauling drum and the storage drum during motion in the reverse. direel ion.

6. In a winch, a positively driven hauling drum, a. storage drum and means to efl'eet a tendency to greater peripheral speed thereof? than the hauling drum, means between the drums whereby the di'll'erence in angular speed set up by the passage over (he drumsl of a unit length of cable creates a predeler mined tension in the cable between the drums, said tension decreasing in magnitude with each successive superimposed layer and independent of the tension between the hauling drum and the load, and means ndiereby the hauling drum is released from the storage drum when its angular speed becomes greater than the angular speed of the storage drum in the opposite direction to that in which the tensioning occurs.

In testimony whereof, I have signed my name to this specification, in thel presence of two subscribing witnesses, this 12th day of September, 1917.

WARREN NOBLE.

vWitnesses:

HERMANN F. CUNTZ, IVILLIAM B. VVALDO.

of Patents,

Washington, D. 0. 

